Moscow shooting: At least 90 killed in 'bloody terrorist attack' at ...

It’s unclear who carried out the attack. Ukraine, which has been at war with Russia since the Kremlin launched its full-scale invasion two years ago, denied it was responsible. Mykhailo Podolyak, a spokesperson for Ukrainian President Volodymyr Zelenskyy, said on social media that Ukraine has “nothing to do” with the attack.

“Everything in this war will be decided only on the battlefield,” he said. “Terrorist attacks do not solve any problems.”

The U.S. Embassy in Moscow on March 7 had warned it was “monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts.”

White House National Security Council spokesperson John Kirby told reporters on Friday that Washington was trying to get more information about the incident, but noted that the “images were just horrible.”

“Our thoughts obviously are going to be with the victims of this terrible, terrible shooting attack,” he said.

Armenia, Belarus, Bolivia, Cuba, Iran, France, Serbia and Turkey also sent their official condolences.

Veronika Melkozerova contributed to this report.

This article has been updated.